Andbeas gulbbandsen hoyde



(No Mode l.)

A. G, HOVDE.

GLOGK STRIKING MECHANISM.

No. 330,896. Patented Nov. 24, 1885.

N. PETERS, Photo-Lithngrapher, Washingion, D. c

UNITED STATES PATENT OFFICE.

ANDREAS GULBRANDSEN HOVDE, OF HONEFOS, NORWAY.

CLOCK STRIKING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 330,896, dated November24,- 1885.

Applicatlon filed August 11, 1885. Serial No. 174,149.

To all whom it may concern.-

Be it known that I, ANDREAS GULBRANDSEN HOVDE, a subject of the King ofNorway, and residing in the town of Honefos, Norway, have inventedcertain new and useful Improvements in Striking-Trains for Clocks; and Ido hereby declare the following to be a full,clear,and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

My invention relates to an improvement in striking-trains for clocks.

The object is to provide striking mechanism of simple construction inwhich the rolling friction shall be materially lessened.

With this end in view my invention consists in certain features ofconstruction and combinations of parts, as will be hereinafterdescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a View of a portion ofclock-work embodying my invention. Fig. 2is a detached view show ing theposition of the escapement just before the clock is ready to strike, andFig. 3 is a similar view showing one of its positions while striking.

The striking-train represented inthe drawings consists of a movementmechanism and a regulating mechanism. The movement mechanism comprisesthe pinion or escapement-disk s, provided with the tooth s and recess 8the disengagingarm a, and the hammer b,balanced by a counter-weight, b,all these parts being rigidly secured on the hammer-axle a. The hammeris continuously drawn toward thebell by means of a spring, 00, by aweight acting independently, or by the Weight of the hammer itself.

The regulating mechanism consists of the step-wheel m, secured on thesleeve of the hour-hand, or otherwise adapted to make one revolutionevery twelve hours, the two-armed lever f f adapted to stop thestriking-movement at the proper time, and the toothed escapement-wheel1', having a series of studs or stops, I, II, &c., on its face; or aseparate disk might be employed to carry the stops and adapted to rotatesimultaneously with the escapement-wheel r. The escapement-wheel r isconstantly under tension tending to force it to the left by theemployment of a spring or weight, g attached to its axle.

(No model.)

A represents the center arbor, to which the minute-hand is attached, andwhich is adapted to make one revolution every hour, as is usual. Thestep-wheel m, above referred to, is sleeved on the arbor A, anintermediate train of gear, 19 p, meshing with the gear (1 q, located onthe arbor and hour-hand sleeve, respectively, transmit the power of theclock actuating spring or weight, as the case may be, to the centerarbor and hour-sleeve loosely mounted thereon.

7c is the bell.

The free end of the disengaging-arm a rests in contact with the underface of a disk, Z, secured on the center arbor, and hence making onerevolution every hour. The disk Z has a notch or groove, Z, formed inits face, into which the end of the arm a falls each hour, at which timethe arm is free to swing away from the disk Z, the hammer-axle therebyleft free to rock, and the tooth s on the escapement-disk s free todisengage the opposing tooth on the escapement-wheel a. The branch f ofthe lever ff is adapted to rest on the face of the wheel m, and as itfollows the suc cessive steps formed thereon it elevates or depressesthe arm f just enough to cause it to engage the proper stop on the faceof the wheel r.

The position represented in Fig. 1 is that which is assumed as the clockis about to strike two. As the end of the arm a enters the groove 1, thetooth a" on the wheel 7, pressing against the nose or tooth s on thedisk s, rotates the hammer-axle toward the right, and as the tooth a"slips past the tooth s the tension of the spring at on the hammer-axleforces the hammer in contact with the bell. As the hammer rebounds thetooth r on the wheel engages the tooth s, the hammer is again thrownback, and as soon as the tooth 1' passes the tooth s a second stroke ofthe hammer takes place. The end of the arm f, or a leaf or toothattached to the end, now engages the stop marked II. The wheel 1' isthereby held in check, and the striking ceases. As the shoulder at theback of the groove Z engages the arm a,it presses downwardly on the arm,thereby rotating the hammer-axle slightly toward the left, and, throughthe tooth s in engagement with the tooth r on the wheel 7, 1'0- tatesthe wheel 1' slightly toward the right,

and releases the, end of the arm f from the stop or pin II. At the sametime, the wheel I m having rotated ashort distance to the right,

the end of the arm f has dropped onto the next step, and has carriedwith it the end of the armf to a point below the stop II, and at aproper elevation to intercept the stop III. The distance from the stopII to the stop III, measured in a direction opposite to that in whichthe wheel r revolves, corresponds to three teeth on the wheel 0*, andhence as the disk Zpresents its groove Z to the end of the arm a at theend of the next hour the clock will strike three. In the same manner,the distances from stop III to IV, from stop IV to stop V, and from stopV to stop VI correspond, respectively, to four, five, and six teeth onthe wheel 1", and the clock will therefore strike four, five, and six.At the time when the clock strikes six the arm f rests upon the loweststep on the wheelviz., that step which is nearest its axle, and as thewheel continues to revolve, the arm f, and hence the arm f, will beraised one step. The wheel 1 has thirteen teeth; hence the distance fromthe stop VI to the stop V, measured in the same direction as before,will correspond to seven teeth, and the clock will next strike seven.The distances from V to IV, from IV to III, from III to II, from II toI, and from I to XII, measured in the same direction as before,correspond, respectively, to eight, nine, ten, eleven and twelve teethon the wheel 1*, and the clock will therefore strike, in order, eight,nine, ten, eleven, and twelve.

WVhen the escapement-wheel is provided with thirteen teetlnas abovedescribed, it will be required to make six revolutions every twelvehours, since there are seventy-eight strokes required to strike thetwelve hours, and one tooth corresponds to one stroke.

By increasing the number of teeth to twenty-six or thirty-nine, thenumber of revolutions required of the wheel 9* during the twelve hoursmight be decreased to three or two, respectively. This change would,however, only necessitate a slight change in the arrangement of thestops on the escapement-wheel and the steps on the heart-wheel, and itsoperation would be quite similar to that already described.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a striking-train for clocks, the combination,with thespring-actuated hammer-axle, the hammer, the escapement disk and thedisengagingarm secured thereon, and the escapement wheel actuated by aspring or weight, of a notched or grooved disk secured on the centerarbor and adapted to engage the disengaging-arm, and the step-facedwheel secured on the hour-hand sleeve and adapted to regulate thestop-lever, substantially as set forth.

2. In a striking-train for clocks, a singletoothed escapement-disksecured on a springactuated hammer-axle, and adapted to be operated by aspring or weight actuated escapement-wheel, and to be held in check byan arm secured on the hammer-axle, in connection with a disk on thecenter arbor, substantially as set forth.

3. In a striking-train for clocks, the combination, with an actuated andhammer-actuating escapement-wheel provided with less than twelve stops,of a step-faced wheel adapted to make one revolution every twelve hours,and a two-armed stoplever adapted to be actuated by the wheel and tostop the escapementwheel at the proper intervals to strike the twelvehours, substantially as set forth.

4:. In a striking-train for clocks, the combi-' nation, with themovement mechanism, consisting, essentially,of the spring-actuatedhammer-axle, the balanced hammer, the escapement-disk, and thedisengaging-arm, of the regulating and actuating mechanism, consisting,essentially, of the power-actuated escape ment-wheel with its stops, thedisk for looking and releasing the diseugagingarm, the wheel, and thetwo-armed lever, arranged substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

ANDREAS GULBRANDSEN llOVllE.

IVitnesses BERTRAM DAHL, O. LEHoNHnYDnR.

